Auto-piston-clamping vise



J. H. STALEY. kUTLO 'PISTON CLAMPING VISE. APPLICATI'ON EiLED NOV-24,1919.

1,349,632. Patented Aug. 17,120;

Ref/672%), JEBc Z v9, St g UNITED .STATES JOSEPH I-I. STALEY, or ooUMBUs-Innreivm AUTOiPISTON-CLA.MBING VISE.

Specification of Letters Patent.

Patented Aug. 17, 1920.

Application filed November 24, 1919. Serial No. 340,376.

To (ZZZ whom it may concern:

Be it known that I, Josnrrr H. STALEY, a citizen of the United States,residing at ohunbus, in the county of Bartholomew and State of Indiana,have invented a new and useful Auto-Pistoh-Clamping Vise, of which thefollowing is the specification.

The object of this invention is to provide a clamping vise torengagingand holding g ns-engine pistons while they are being finished inthe process of manufacture, but more particularly, while they are beingafterward repaired, and the tool is of more interest, therefore, togarage and repair shop mechanics, where vise facilities are morelimited.

A further object is to provide a quickacting mechanism which will notmar or injure the piston in any way, and which can be bolted to a bench,table, post, or other suitable support.

I accomplish the above, and other objects, by the mechanism illustrated,herewith; wherein I Figure 1 is a perspective view of my invention witha piston held by it in position for work to be done thereon.

Fig. 2 is an underside plan view.

F 3 is a vertical central-section on the line 3 3 of Fig. 2.

Like characters of reference indicate like parts in the three views.

The base 41. of cast-iron in the form of an annular disk, recessed at 5,on its under side, to save weight and cost of material and to provideroom for pivot-bolt heads. It has perforated ears 6, for bolting to abench, and has a diametrical slot 7 for the passage of a clamp-bolt andto receive and guide a clamp-lug, which will presently be described in.detail. The slot terminates in a large circular opening 8, for thepassage of the piston pitman.

1W ounted on the top of the base 4, is a V- shaped clamp-head 9, throughthe perforated short stem of which is a bolt 10, which enters therecessed portion 5, of the .base, through slot 7, and is retained by anut 11. The clamp-head also has an underside lung 12, which operateswith a close sliding fit in slot 7, This lug is suificientlyclose tobolt 10 to serve as a lock: for not 1'1. The inner faces of thebifurcated portion of the clamp are lined with leather 13 to preventinjury to the piston clamped by it.

Dianietrically opposite the clamp-head 9 is a second clamp-head having,a curved flange 14:, also lined with leather on its side toward head 9.It has an outer slotted member 15, through which is a retaining, bolt16, the lower end of which held in. base 4:. Resting upon the member1.5, is a cam 17, which is pivoted on the upper end of bolt 16, andbears against the flange 14; of the clamp-head. The cam has a handle 18by which it is rocked about bolt 16.

In the operation of my device the clamphead'9 is set, in its distancefrom the last head, roughly, to fit the size of the piston to beoperated on; then, after the piston is placed between the twoclamp-heads, it is held by so rocking cam 17 as to force its clamp-headtightly against the piston. Should. there be a pitman attached to thepiston it may drop down. through the opening 8. The lower end of thepiston rests upon the base 4.

Having thus fully described my invention, what I claim as new and wishto secure by Letters Patent of the United States is 1. In a piston-vise,a base having a diametrical slot, a clampingphead mounted on the baseand having: a lug enterine: said, slot, means for holding theclamping-head in a given position, a second clampingdiead on the basediametrically opposite the first clamping-head, having a curved flangeand. also having a slot in alinement with the slot of the base, a cam onthe last clampinghead acting against said. curved flange, and a boltpivoting the cam and passing through the slot in the secondclamping-head and securing the cam and second clamping-head to the base.

2. In a piston-vise, a base having a diametrical slot, a clamping-headmounted. on the base and havine a lug entering said slot, means forholding the clamping-head in a given position, comprising a bolt passingthrough the head and slot of the base and having a nut held by the endof said lug from rotating, a second clamping-head on the basediametrically opposite the first clampinghead, having a curved. flangeand also having a slot in alinement with the slot of the base a cam onthe last clampinghead acting against said curved flange, a bolt plvotlngthe cam and passlng through the slot 1n the second clamplng-head andsecuring the cam and second clamping-head to the base, and linings ofsoft material on JOSEPH H. STALEY.

